Draft cable for agricultural tillage device

ABSTRACT

The invention discloses a differential connecting rod and draft cable for an agricultural tillage device. The invention consists of a differential connecting rod which is positioned parallel to the center frame. The center frame is connected to the inner wing frame by a universal joint. The universal joint has a spherical bearing and a pivot. The pivot is positioned in a slot. The differential control rod positions the pivot in the slot. An ‘L’-shaped linkage and a spring assembly pivotally support the rod.  
     The draft cable is attached to the center frame hitch and outer wing. It is supported in the center by a folding support arm. This allows the wire to be moved when the cultivator is being transported. The draft cable transfers the draft force exerted on the outer wing to the center frame hitch.

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims domestic priority on U.S. ProvisionalPatent Application Ser. No. 60/106,155, filed on Oct. 29, 1998.

BACKGROUND OF INVENTION

[0002] 1. Field of Art

[0003] This invention relates to the improvement of an agriculturalground-working cultivator. More specifically it relates to animprovement of the center frame of a cultivator and support for a pairof opposing wings on the said cultivator.

[0004] 2. Description of Prior Art

[0005] The need to till and cultivate soil for the planting of crops hasbeen accomplished since the earliest days of civilization. Morerecently, tillage devices have increased in complexity and size,depending on the type of crops, quantity and soil being tilled. Therehas also been an increased emphasis on conserving natural resourcesresulting in these concerns being integrated in modem tillage systems.These concerns have resulted in larger and more complex tillage systemsthat assist in achieving these goals. A larger tillage system allows asingle operator to perform tillage operations on a greater area. Moresophisticated tillage systems further allow for the accomplishment oflow till and no till farming techniques. Low till and no till farmingencourages tilling, planting and fertilizing in a single pass of thetillage device or cultivator through the field. By only disturbing thesoil a single time, there is less soil compaction, less moisture loss,less pesticides and herbicides needed and less fertilizer required.However, these larger and more complex tillage systems createcomplexities that were previously unknown in the art.

[0006] Previously, an agricultural tractor could pull a relatively smalltillage device or cultivator. As the tillage device or cultivator movedover hills and similar undulations in the terrain all the ground-workingimplements maintained contact with the soil. The width of the tillagedevice was sufficiently small such that it generally did not haveproblems maintaining ground contact. However, as the tillage deviceswere increased in width, so as to be able to till a greater area in asingle pass, the undulations in the ground resulted in theground-working tools failing to always contact the earth. Also, totransport the tillage device or cultivator for the farming operations itwas also necessary for the device to be capable of being collapsed to awidth sufficient to be moved. To accomplish these goals, a centersection with a set of pivotable wings was designed. The wings couldpivot horizontally relative to the center section allowing the tillagedevice to accommodate some undulations in the ground. The wings couldalso be folded into the center section allowing for easy transportbefore and after farming operations. Eventually, an outer set of wingswas added increasing the width of the tillage device. FIG. 1 illustratesthe general configuration of a tillage device or cultivator.Specifically, there is a center section directly behind the tractor.There is a set of inner wings and outer wings respectively surroundingthe center section. Some cultivators are folded into the transportposition along an axis along the direction of travel; other cultivatorsare folded along a diagonal axis. In prior art cultivators, the wingscan rotate on an axis in the direction of travel, the wings generallycannot rotate, flex or bend on an axis perpendicular to travel. Finally,the additional inner wings and outer wings create large additional draftforces on the frame of the cultivator. (Draft forces are the createdwhen the ground-working tool is pulled through the soil.) These arecomplex problems to overcome, especially when considering the need forthe tillage device to be a collapsed from its field operation mode tothe compact transportation mode.

[0007] Consequently, the need exists for a linkage, which allows for theinner wings to move perpendicular relative to the center section of atillage device. Also the need exists for a draft cable which helpsdistribute the draft load generated by the outer wings.

OBJECTS OF THE INVENTION

[0008] It is an object of the present invention to provide adifferential connecting rod for the present invention.

[0009] It is a further object of the present invention to provide adraft cable to support the outer wings.

[0010] It is a further object of the present invention to provide ajoint having 3 axes of freedom for connecting the wing sections to thecenter section about a transverse axis longitudinal to the drawbar inthe field operating position.

[0011] It is a further object of the present invention to provide adifferential connecting rod, which allows the wings to be moved into atransportation mode.

[0012] It is a further object of the present invention to provide adraft cable, which can be moved to a stowed position during thetransportation mode.

[0013] It is a further object of the present invention to provide adifferential connecting rod, which has a transport assembly, which isused to prevent wing movement when the tillage device is intransportation mode.

[0014] It is a further object of the present invention to provide adifferential connecting rod that can be adjusted.

[0015] It is a further object of the present invention to provide adifferential connecting rod that can be moved 90 degrees to allow forstowage during the transportation mode.

[0016] It is a further object of the present invention to provide aninexpensive means for providing draft support to the outer wings of thetillage device.

SUMMARY OF THE INVENTION

[0017] The invention overcomes the deficiencies of the prior art. Theinvention controls the movement of the inner wings which surround thecenter section of a cultivator or tillage device. The invention alsoprevents damage to the universal joint that connects the inner wingframe to the center frame. The invention also consists of a foldingdraft support wire which transfers a portion of the draft force exertedon the outer wings to the center hitch frame of the cultivator.

[0018] The present invention is accomplished a differential control rodthat is parallel to the center frame. The center frame is typicallyconnected to the inner wing frame by a universal joint. The presentinvention is a modified universal joint that is attached to the centerframe by a spherical bearing and pivot allowing for a 3^(rd) axis ofmovement. The pivot is positioned inside a slot on a bracket. An‘L’-shaped linkage controls the movement of the pivot within the slot.The linkage is pivotally attached to the center frame and differentialbar. A spring assembly supports the center of the differential bar. Thespring assembly biases the pivot in the slot to a center position. Whenthe cultivator wings are moved to the side and rotated into thetransportation position, the tongue in the transport assembly isinserted between the rods. This holds the rods and prevents damage tothe slot and universal joint during transport.

[0019] The folding draft support wire is a means by which the draftforce on the outer wings is transferred to the center hitch frame. Thewire is pivotally attached to the outer wing and wing hitch frame.Supporting the wire is a folding support arm. The arm has an outer armpivotally attached to an inner arm. The inner arm is attached to thewing hitch frame. Controlling the outer arm is a chain that is attachedto the wing hitch frame by a chain arm. The chain is also attached to anelongated plate on the outer arm. This design allows the support arm tobe folded when the cultivator is in the transportation mode.

BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The advantages of this invention will be apparent uponconsideration of the following detailed disclosure of the invention,especially when taken in conjunction with the accompanying drawingswherein:

[0021]FIG. 1 is an overhead schematic view of the present invention.

[0022]FIG. 2 is a side, overhead view of the differential control bar inthe field mode.

[0023]FIG. 3 is a side, overhead view of the differential control bar inthe transport mode.

[0024]FIG. 4A is a side view of the cultivator in the headland mode.

[0025]FIG. 4B is a rear view of the cultivator in the field mode.

[0026]FIG. 4C is a rear view of the cultivator in the transportationmode.

[0027]FIG. 4D is a side, front view of the transport assembly.

[0028]FIG. 4E is a side, front view of the differential rod while thecultivator is field operating mode.

[0029]FIG. 4F is a view of the folding support wire when the cultivatoris in the transportation mode.

[0030]FIG. 5 is a front view of the differential control bar, showingboth spring assemblies.

[0031]FIG. 6 is a front view of the left side of the differentialcontrol bar showing a single spring assembly.

DETAILED DESCRIPTION OF THE INVENTION

[0032] Referring to the drawings, it is possible to observe the majorelements and general operation of the present invention. Left and rightreferences are used as a matter of convenience and are determined bystanding at the rear of the tillage device or cultivator and facing theforward end in the normal direction of travel when the tillage device orcultivator is operating in the field (field mode, see FIG. 4B).Likewise, forward and rearward are determined by normal direction oftravel in the field mode of the tillage device or cultivator. Upward ordownward orientations are relative to the ground or operating surface.Horizontal or vertical planes are also relative to ground.

[0033]FIG. 1 illustrates a general overhead view of the pull-typetillage device or cultivator that the present invention is located. Aconventional tillage device or cultivator consists of a center section 2with two inner wings 3 positioned next to the center section 2. Next tothe inner wings 3 are the outer wings 4. The tillage device orcultivator 1 has a triangular shaped center frame hitch 9. The base ofthis hitch 9 is ultimately attached to the center section 2. The frontof the hitch 9 is attached to a tractor mount 8. The tractor mount 8 isattached to a conventional agricultural tractor. The tractor pulls thetillage device or cultivator 2 and also supplies hydraulic power ormechanical power via the power-take-off (pto) to the various implementson the cultivator 2. Supplementing the center frame hitch 9 is the winghitch frame 10 that provides draft support to the inner wings 3.Supporting the entire cultivator 2 are a series of castor wheels 5(located towards the front of the cultivator 2) and a series of packingor rear supporting wheels 7 (located towards the rear of the cultivator2). The center section 2 has a center frame 22 and a toolbar 6. Thetoolbar 6 supports various ground-working implements. Such implementsare well known in the art and include plows, coulters, discs as well asother implements. Each inner wing 3 and outer wing 4 also possesses atool bar 6. The inner wing 3 also has an inner wing frame 13. The centerframe 22 and inner wing frame 13 are connected by means of a universaljoint assembly 21 that can best be seen in FIGS. 2 and 3. FIG. 1 showsthe cultivator 2 in the field mode. In the field mode, the inner andouter wings 3 and 4 are fully extended horizontally across the field.There is also a headland mode (see FIG. 4A) where the wings (2 and 3)are still extended, but the tool bars 6 are raised out of the soil. Theheadland mode is used at the end of a crop row when an operator wishesto turn the tractor and cultivator 2 around and partially raise theground working implements. The transportation mode (see FIG. 4C)involves rotating the center frame 22 and inner wing frame 13 upwardsfor 90 degrees. This rotates the toolbars 6 and packing wheels 6 up intothe air. The wings 3 and 4 are rotated rearwards. This results in acultivator that is narrow and may be transported to another field. Thedraft support wire 20 can best be seen in FIG. 1 and extends from thewing hitch frame 10 to the outer wing 4. During field operations, thiswire can transfer some of the draft force in the outer wing 4 to thecenter hitch frame 9.

[0034] As seen in FIGS. 2 and 3, the differential connecting rod 20 islocated parallel to the center frame 22. It controls the movement of theuniversal joint assembly 21. There are two, identical connecting rods 20which each control the universal joint assembly 21 located on the leftand right sides of the center frame 22. For purposes of brevity, on theright side is illustrated and discussed. However, the left side works inan identical fashion. The universal joint assembly consists of auniversal joint 25 with a center frame attach 27 and a wing attach 26.Generally speaking, the center frame 22 is connected to the center frameattach 27 and the wing frame is connected to the wing attach 26. FIG. 2shows the center frame 22 and universal joint assembly 21 oriented inthe field mode. FIG. 3 illustrates the center frame 22 and universaljoint assembly 21 rotated forward 90 degrees into the transportationmode. Connecting the universal joint assembly 21 to the center frame 22is bracket 23 with a slot 24. At the other end of the universal joint 25a conventional spherical bearing 28. The spherical bearing 28 allows fora full range of motion. This permits the universal joint 25 to move inthe slot 24. This allows the wing section a full range of motion aboutthe universal joint. Previously, the wing section could only rotateabout an axis in the direction of travel. Now, the wing section canrotate upwards or downwards on an axis perpendicular to the direction oftravel and about a vertical axis. However, to control the movement ofthe universal joint 25 within the slot 24, there is the differentialcontrol bar 20. The U joint assembly 21 has 3 axes of motion. The 3 axesjoint consists of a u-joint with one joint pin connected to a yoke onthe center frame 22 at bearing 28 at one end and constrained in slot 24at the other end, defining a 1st axis longitudinal to the pin and a 2ndaxis perpendicular to the pin through the bearing 28. The pin is allowedfreedom to rotate about the 2nd axis within the limits of the slot 24 ofthe bracket 23. The 2nd axis is therefor generally transverse. A 3rdaxis is defined by the joint pin connected to a yoke on the wing frame,which is perpendicular to the 1st axis and is a pivot for inner wings tofollow ground elevations when in transport. The 1st axis in thetransport position allows rear folding of the wing frames and in thefield position is a pivot allowing wings to follow ground elevations asshown in FIG. 2. The 1st axis allows rear folding of the wing frames.The 2nd axis allows the drawbar to rotate relative to the center sectionso that the attached gangs are on average, aligned with the pitch of theground (rising or falling slope in the direction of travel). The rangeof the 2nd axis rotation is limited by the ends of the slot 24.

[0035] In FIG. 2, the differential control bar 20 is attached towardsthe center of the center frame 22 by means of the spring assembly 40.The spring assembly 40 will discussed later. At the end of the centerframe 22, the control bar is pivotally attached to an ‘L’-shaped linkage30. The ‘L’-shaped linkage is pivotally attached to the center frame 22at the linkage pivot 31. The end of the ‘L’-shaped linkage 30 isattached to the universal joint assembly 21 at the pivot 29. Turning toFIGS. 5 and 6, it is possible to observe both spring assemblies 40. Aspreviously indicated both spring assemblies 40 are identical inconstruction and operation. FIG. 6 illustrates a single spring assembly40 viewed overhead. Each spring assembly 40 consists of a co-axialspring 41 held in a slightly compressed positioned by a pair of threadedtie rods 42. The differential tie rod is in 2 parts that, in fieldoperation abut each other at the center of the center frame section.Each part 20 is slidably supported by a inner stop block 46 which isattached to the frame 22. The differential tie rod is biased to acentral position as shown by a spring assembly 40. The spring assembly40 is attached at one end to the inner stop block 46 by tie rods 42. Thespring is co-axial with the differential tie rod 20. It is constrainedbetween 2 abutment inner sliding blocks 44 a and 44 b. Inner slidingblock 44 a is constrained by nuts 45 at the end of tie rods 42. A pairof outer sliding blocks 43 a are attached to the differential tie rod 20(secured by bolt shown) and are in abutment with an inner sliding block44 a. Another pair of outer sliding blocks 43 b are welded to thedifferential tie rod 20 and are in abutment with inner sliding block 44b, passing through the inner stop block 46. In operation, when a wingrotates about the 2nd axis in direction 66 a, driven to an averageposition between the attached gangs as the ground slope varies, then itdrives the L-shape lever and then the tie rod in direction 66. Thespring is compressed between the outer sliding blocks 43 a and the innerstop block 46, between which are also pressed inner sliding block 44 aand 44 b. The motion is directed onto the other abutting tie rod andcauses the opposite wing to rotate about it's 2nd axis in an equalamount in the opposite direction. Therefor the center section issuspended at an average height between the 2 adjacent wing sections.

[0036] When being driven from the other wing section, the tie rod isforced in the other direction 67. Outer sliding blocks 44 b about ontothe inner sliding block 43 b. The spring shown in FIG. 6 is thencompressed between the outer sliding blocks 43 b and nuts 45, betweenwhich is again pressed the inner sliding blocks 44 b and 44 a. Thespring works in both directions to bias the ½ of the tie rod assembly toa central position. The other ½ assembly works the same way. The heightof center section is driven by the 3 axes joints attaching the wingframes on either side. The differential tie rod assembly keeps it at anaverage position between the 2 wing frames and biases the wing framesinto rotational alignment with the center frame about the 2nd axis. Italso distributes weight transfer force that may be optionally applied tothe center frame onto each of the wing frames. It should be noted thatthere are several possible secondary embodiments involving the tie rods.

[0037] When the cultivator 2 is in the transportation mode, as seen inFIG. 3, it is important the pivot 29 be fixed in the slot 24. Becausethe wing section's weight is support partially by through the universalassembly 21, it is important the pivot 29 not impact the slot 24. Toachieve that goal, a transport assembly 47 has been included to preventthe differential rod from translation. The transport assembly 47 has atongue 48 attached to the center frame 22. A tongue spring 49 is biasedbetween the differential rods 40 as seen in FIG. 3. During thetransition from the field mode (as seen in FIG. 2) to the transportationmode (as seen in FIG. 3), the wings are folded upwards 90 degrees andthe ends of the wings are folded rearwards. This places a force similarto 67 a on the pivot 29. These forces pull both differential bars 20away from the center of the center frame 22. The spring-biased tongue 49is inserted between the rods when the center frame 22 is rotated forward90 degrees. This locks the rods and holds the pivot 29 at one end of theslot 24 during transport (as seen in FIG. 4D). Conversely, the tongue 48is removed from the between the rods when the center frame 22 is rotatedinto the field position.

[0038] The folding draft support wire 50 can be seen in FIGS. 1 and 4F.The wire 50 is attached to the cultivator 2 at three points. The wire 50is pivotally attached to the inner hitch 52. At the opposite end, thewire 50 is pivotally attached to the outer wing hitch 51 (see FIG. 4F).Supporting the wire 50 in the middle is the folding support arm 53. Thefolding draft support wire 50 is designed to transfer the draft forcecreated by the outer wings to the center hitch frame. Failure totransfer the draft force could result in the outer wings twisting behindthe center section. As seen in FIG. 4F, the support wire 50 is liftedtowards the center frame and wing sections during the transportationmode. The folding support arm 53 accomplishes this. The folding supportarm 53 consists of an inner arm 54 attached to the wing hitch frame 10.A hinge 56 pivotally attaches the outer arm 55. To ensure that thesupport arm 53 remains fully extended during the field mode, the outerarm 55 has an elongated plate 55 a. Attached to the elongated plate 53 ais a chain 57. The chain is connected to the wing hitch frame 10 by apivotally mounted chain arm. The support wire 50 is attached to the topof the outer arm 55. During the field mode, the wing hitch frame 10 isrotated 90 degrees downwards. The chain arm 58 pulls the elongated plate55 a and outer arm 55 away and downwards. This extends the draft wire50. Conversely, when the converting the cultivator from the field modeto the transport mode, the wing hitch frame 10 rotates upwards 90degrees. This allows the outer arm to pivot about the hinge 56. The wireis moved towards the hitch frame as seen in FIG. 4F. It is the tensionin the wire as the wing frames are folded rearwardly that causes thewire to be pulled in close to the frame in the transport position. Theouter arm guides the position of the wire up and over the wheel so itdoes not rub on the wheel or the ground in transport.

[0039] It will be obvious to those skilled in the art that variouschanges may be made without departing from the scope of the inventionand the invention is not to be considered limited to what is illustratedin the drawings and described in the specification.

What is claimed is:
 1. A connecting rod for a cultivator, comprising: a.a center frame positioned between a pair of inner wings, said centerframe connected to each said inner wings by a universal joint, saiduniversal joint supported on the center frame by a spherical bearing anda pivot; b. a bracket affixed to the center frame, said bracket having aslot, therein for allowing said pivot to move; c. a differential barslideable attached to the center frame; and d. a ‘L’-shaped linkagepivotally attached to the center frame and differential bar, saidlinkage controlling the motion of the pivot in the slot.
 2. Theconnecting rod described in claim 1 , further comprising a springassembly attached to the differential bar, said assembly furthercomprising: a. a spring co-axial to the differential bar; b. an innerstop block and an outer stop block, said stop blocks attached to thecenter frame and slideably supporting the differential bar; c. an innersliding block slideably attached to the differential bar, said innersliding block for compressing said spring; d. an outer sliding blockaffixed to the differential bar, said outer sliding block contacting theinner slide block; and e. a pair of tie rods, each tie rod affixed tothe inner stop and outer stop.
 3. The connecting rod described in claim2 , further comprising a transport assembly, said transport assemblyfurther comprising: a. a tongue pivotally affixed to a hitch centerframe, said tongue capable of rotating and contacting the differentialbar; and b. a tongue spring for biasing the tongue towards thedifferential bar.
 4. A draft cable for connecting a wing hitch frame toan outer wing of a cultivator, comprising: a. a draft support wire; b.an outer wing hitch attached to the outer wing, said wire pivotallyattached to the outer wing hitch; c. an inner hitch attached to the winghitch frame, said wire pivotally attached to the inner hitch; and d. afolding support arm attached to the wing hitch frame, said wire affixedto the arm.
 5. The draft cable described in claim 4 , wherein saidfolding support arm further comprises: a. an inner arm attached to thewing hitch frame; b. an outer arm pivotally connected to the inner by ahinge; c. a chain arm pivotally connected to the wing hitch frame; andd. a chain connecting the chain arm and the outer arm.
 6. In aground-working cultivator, said cultivator having a center sectionconnected to a tractor mount by a center hitch frame, a pair of innerwing sections next to the center section, said inner wing sectionsconnected to the center hitch frame by a wing hitch frame, a pair ofouter wing sections positioned next to the inner wing sections, eachwing section and center section having a plurality of toolbars, eachtoolbar, each wing section and center section support by a plurality ofcaster wheels and packing wheels, the center section having a centerframe, each inner wing having an inner wing frame, and each outer winghaving an outer wing frame, said center frame pivotally connected to theinner wing frame by a universal joint, the improvement comprising adifferential connecting rod and a draft cable further comprising: a.said universal joint supported on the center frame by a sphericalbearing and a pivot; b. a bracket affixed to the center frame, saidbracket having a slot for allowing said pivot to move; c. a pair ofdifferential bars each bar slideable attached to the center frame eachsaid differential bar having, a spring, an inner stop block and outerstop block, said stop blocks attached to the center frame and slideablysupporting the differential bar, an inner sliding block slideablyattached to the differential bar, said inner sliding block forcompressing said spring, and outer sliding block affixed to thedifferential bar, said outer sliding block contacting the inner slideblock and a pair of tie rods, each tie rod affixed to the inner stop; d.an ‘L’-shaped linkage pivotally attached to the center frame anddifferential bar, said linkage controlling the motion of the pivot inthe slot; e. a draft support wire; f. an outer wing hitch attached tothe outer wing, said wire pivotally attached to the outer wing hitch; g.an inner hitch attached to the wing hitch frame, said wire pivotallyattached to the inner hitch; and h. a folding support arm attached tothe wing hitch frame, said wire affixed to the arm.
 7. The improvementdescribed in claim 6 , further comprising a transport assemblycomprising: a. a tongue pivotally affixed to a hitch center frame, saidtongue capable of rotating and contacting the differential bar; and b. atongue spring for biasing the tongue towards the differential bar. 8.The improvement described in claim 7 said folding support arm furthercomprising: a. an inner arm attached to the wing hitch frame; b. anouter arm pivotally connected to the inner by a hinge, said outer armhaving an elongated plate; c. a chain arm pivotally connected to thewing hitch frame; and d. a chain connecting the chain arm and theelongated plate.
 9. A connecting rod for a pull-type agriculturaltillage device, comprising: a. a center frame positioned between a pairof inner wings, said center frame connected to each said inner wings bya universal joint, said universal joint supported on the center frame bya spherical bearing and a pivot; b. a bracket affixed to the centerframe, said bracket having a slot for allowing said pivot to move; c. apair of differential bars, each bar slideably attached to the centerframe; d. a spring assembly for controlling the movement of eachdifferential bar; e. a tongue assembly which can prevent the movement ofeach differential bar; and d. a ‘L’-shaped linkage pivotally attached tothe center frame and differential bar, said linkage controlling themotion of the pivot in the slot.
 10. The spring assembly described inclaim 9 , further comprising: a. a spring co-axial to each differentialbar; b. an inner stop block and an outer stop block, said stop blocksattached to the center frame and slideably supporting the differentialbar; c. an inner sliding block slideably attached to the differentialbar, said inner sliding block for compressing said spring; d. an outersliding block affixed to the differential bar, said outer sliding blockcontacting the inner slide block; and e. a pair of tie rods, each tierod affixed to the inner stop and outer stop.
 11. The transport assemblydescribed in claim 10 , further comprising: a. a tongue pivotallyaffixed to a hitch center frame, said tongue capable of rotating andcontacting the differential bar; and b. a tongue spring for biasing thetongue towards the differential bar.
 12. The tie rods described in claim11 , further comprising a threaded surface for adjusting the spring. 13.The differential bars described in claim 12 wherein there is only onepair of differential bars.
 14. The center frame described in claim 13wherein said center frame can be rotated 90 degrees.
 15. A draft cablefor connecting a wing hitch frame to an outer wing of a pull-typeagricultural tillage device, comprising: a. a draft support wire; b. anouter wing hitch attached to the outer wing, said wire pivotallyattached to the outer wing hitch; c. an inner hitch attached to the winghitch frame, said wire pivotally attached to the inner hitch; and d. afolding support arm attached to the wing hitch frame, said wire affixedto the arm, whereby the outer wings are provided draft support duringoperation of the tillage device.
 16. The draft cable described in claim15 , wherein said folding support arm further comprises: a. an inner armattached to the wing hitch frame; b. an outer arm pivotally connected tothe inner by a hinge; said outer arm having an elongated plate; c. achain arm pivotally connected to the wing hitch frame; and d. a chainconnecting the chain arm and the elongated plate, whereby the movementof the outer arm and inner arm is controlled.
 17. The draft cable inclaim 16 , wherein there are only 2 draft cable positioned on each sideof the pull-type tillage device.
 18. The elongated plate in claim 17 ,wherein the elongated plate firmly secures the outer arm to the innerarm in an extended manner.
 19. A agricultural cultivator comprising: a.a hitch frame and a drawbar frame comprising of a center and a wingdrawbar frames; b. said center drawbar frame pivotally attached to thehitch frame on a transverse axis for rotation between a downward workingposition and an upward transport position; and c. said drawbar wingframe is attached to a side of the center frame by a multi-jointassembly whereby: i. the multi-joint assembly is attached to the drawbarcenter frame defining a 1st axis perpendicular to the center drawbarframe; ii. the multi-joint assembly is attached to the drawbar wingframe defining a 2nd axis perpendicular to the 1st axis andperpendicular to the drawbar wing frame; and iii. the multi-jointassembly includes a 3rd axis generally longitudinal to the drawbarframe.
 20. The implement as in claim 19 , in which the multi-jointassembly is pivotally attached to the drawbar center frame at a firstend, and at a 2nd end constrained within a slotted end of the drawbarcenter frame, so that the 3rd axis is at the first end and movement ofthe multi-joint assembly is about the 3rd axis is limited by the 2nd endwhich is constrained within the slotted end, thereby allowing relativerotation between the drawbar center and wing frames about the 3rd axis.21. The implement as in claim 19 , in which the multi-joint assembly isattached to the drawbar center frame at one end pivotally, and at a 2ndend to a 1st end of a differential lever, and the lever is pivotallyattached to the drawbar center frame for pivotal movement, allowingmovement of the multi-joint assembly about the 3rd axis thereby allowingrelative rotation between the drawbar center and wing frames about the3rd axis.
 22. The implement as in claim 21 in which the pivotal movementof the differential lever is limited.
 23. The implement as in claim 22in which the pivotal movement of the differential lever is biased. 24.The implement as in claim 21 in which a 2nd end of the differentiallever is connected to one end of a differential control rod, and theother end of the differential control rod is connected to a similardifferential lever at an opposite end of the drawbar center frame forcontrolling relative rotation of the drawbar wing frame about the 3rdaxis differentially with a 2nd drawbar wing frame.
 25. The implement asin claim 24 in which the differential control rod is split in 2 partswhich are guided on the drawbar center frame so that inner ends of the 2parts abut each other, the implement further comprising: a. limits tolimit the range of pivotal movement of the differential levers; and b. atransport assembly which can be placed between the inner ends therebymaintaining the position of the differential levers at their respectivelimit.
 26. A draft cable for connecting a hitch frame to an wing sectionof an implement frame comprising: a. a draft support wire; b. said wireattached to the wing; c. said wire attached to the hitch; and d. afolding support arm pivotally attached to the implement, said wireaffixed to the support arm.
 27. The draft cable as described in claim 26also having a mechanism for pivoting the folding support arm, themechanism being attached at one end to the folding support arm and atthe opposite end to the implement for moving the arm and the wirebetween an extended working position and a stowed transport position.28. The draft cable as described in claim 27 wherein said mechanism is ahydraulic actuator.
 29. The draft cable as described in claim 27 whereinsaid mechanism is a link.
 30. The draft cable as described in claim 29wherein said mechanism is a chain attached at said one end to thefolding arm and attached at it's opposite end to a bar, the bar'sopposite end attached to the implement.
 31. The draft cable as describedin claim 30 , where the folding support arm is pivotally attached to theimplement hitch at a 1st point.
 32. The draft cable as described inclaim 21 in which the said link's opposite end is connected to theimplement frame at a 2nd point.
 33. The draft cable as described inclaim 32 in which the frame is rotated relative to the hitch betweennon-working and working positions and there being separation between 1stand 2nd points such that when the implement frame is rotated,translation between the points actuates to extend or relax the foldingsupport arm.